biggert



June 16, 1925. Re. 16,096

- F. C. BIGGERT, JR

ROLLING HILL Original Filed 'Sept. 8. 1922 3 sheets-Sheet 2.

June 16,1925. e, 16,096

. F. C. BIGGERT. JR

ROLLING MILL Orizinal led ept- 8. 1922 3 Sheets-Sheet 5 imatcly 13 feet.

Reissued June '16, 1925.

UNITED STATES roaA'rIoN or rnnNsYLvAmA.

1a., or PITTSBURGH, ENGINEERING & FOUNDRY COMPANY, or

PAT Eur OFFICE;

1 ROLLING- MILL.

Original No. 1,487,007, dated March is, 1924,

Serial no. 586,914, filed September s, 1922. A u aici j for reissuefiled December 6, 1924. Seria1 No. 754,443.

' To all whom it may com-em:

Be it known thatJI, FLORENCE C. B1oenn'r, J12, a citizen of the UnitedStates, re-

siding at Pittsburgh,

largely diagrammatic and partly in section, illustrating a portion ofthe roughing stand rolls and a portion of the finishing stand rolls; 7

I Figure 2 is ayiew, partly in elevation and partly insection,

on the line II-II of Figure l; and

Figure 3 is a top lan View of the construction illustrated n Figure 1.

The present invention relates broadly to rolling mills, and moreparticularly to roll- 'ing' mills of the balanced type especiallyadapted for the rolling of sheets.

It has heretofore been proposed in this art to construct sheetmillscomprising a two'high roughing stand and a two-high finishing standlocated with the roilsin endto-end relationship. Iii such; mills it iscustomary to drive the bottom rolls of both stands from one end througha suitable spindle located intermediate the roll stands and carried in afloating housing. In a 4A:- inch mill, for example, the distance betweenthe center of one of the rolls inthe roughing stand and the center ofthe correspond ing roll in the finishing stand is approx- This distanceis not so great but that it is possible for a man standing at anintermediate point with respect to the roll stands, to eil'ect thedesired transfer of material from the rolls of one stand to the rolls ofthe other stand.

It is desirable with such mills, however. to drive the top roll of theroughing stand in order to assist in the feeding of a sheet bar intoposition between the rolls. With ordinary unbalanced mills, it is notconsidered advisable to jump the' upper roll 50 more than three-fourthsof an inch, al'

though in some mills such rolls anches. Vith' bal" anced rolls, however,it is notuncomrnon to I jumped as much as 1% roll bars as thick as 2inches.

\Vith the present invention it is possible to maintain the advantagesofa balanced} mill and the advantages which are derivedv top roll of.

from a positive driving ofthe the roughing stand, Without increasingthedistance between the centers of the roll. stands to such an extent asto makejthe,

transfer operation an unwieldly ,one.

At the present time there are severaldifferent methods of effecting thistype of roll drive. comprises the provision of a gear tram-i111termediate the two roll stan'ds.

faces plus the length the rolls of one stand other stand a difficultoperation.

In other cases it has drive the power. motor, together constructiongenerally undesirable.-

the upper roll of I out interfering with mill.

The attainn'icnt of this rvsu lt has been attempted by the provision ofa' chain: drive alnlcliitch connection intermediate the rolls, but ithas been found thatth oration ofthe clutch has not been' 'satisfa itory.

mill of the type ordinarily used.

PENNSYLVANIA, ASSIGNOB- T0 PITTSBURGH, PENNSYLVANIA, A 003-,

The most common of thesemethods In suchcon structions, however, thelength of the gear of the necks, and the, Wobbler-s required for drivingthe isamejis. such that the distance between the centersof the rollstands is increasedto'such-anein tent as to make the transfer of metalfrom" to the-Trolls. ofthc been proposed to' top roll of the roughingstand by a separate motor of comparatively lo'w -horse" The difliculty.of mounting this with the difliculty' of'a'C- curately controlling the,same, makes this-- By the present invention, the objections to 7existing constructions are obviated. while: n'nuntaining the advantagesof a balanced stand and the rolls 3 of the finishing stand.

- usual standard construction. and comprises to drive a ring lugs 6projecting therefrom. These lugs are adapted to be yieldingly supportedfrom standards 7 of suitable construction projectin upwardly from theshoe plates 8.

The desired support for the floating housing may be convenientlyobtained by the use of tension rods 9 extending through the lugs (Sandthe standards 7 and surrounded by compression springs 10 abutting at oneend against the standards 7 and at their opposite ends againstadjustable followers 11. It will be apparent that by reason of thisconstruction the springs may be. placed under the desired load tomaintain the parts in the proper operating pos: ons. I

The ends of the spindle 4 may be formed, as is customary in this art,.to provide a wobbler joint cooperating with the couplings 12, which arethe ends of the rolls. This construction permits the necessary relativemovement between the respective rolls and between each of the rolls andthe housing 5.-

Secured to the spindle 4 within the floating housing is a gear l3 whichis adapted gear 14 provided with an inwardly projecting friction flange15. This gear. is frictionally engaged between the opposed frictionfaces 16, ,one of which is carried by the sleeve 17 journaled within thefloating of which is carried by the sleeve member 18 telescopicallymounted with respect to the sleeve 17 and journaled in the opposite sideof the housing 5. The respective sleeves 17 and 18 may be provided withinterengaging keys 19 providing the desired driving relationshiptherebetween, and may be held in cooperative frictional engagement withthe flange'15 by a compression spring 20. This frictional drivingconnection permits movement of the gear 14 independently of the.

sleeves 17 and 18 under certain load conditions, while insuring thedesired driving relationship between the rolls when a sheet bar is notbeing operated upon.

The movement of the gear 14 is in turn transmitted to the top roll 2 inthe roughing stand through a suitable driving connection 21having auniversal driving engagement within the sleey'e 17 and a similarengagement within the cow pling 22 at its other end.

From the foregoing it will be apparent movable end wise over housing 5at one end and the other rolls of the at one end that there/is provideda compact means for driving the top roll of a roughing, stand of abalanced sheet mill at all times. This advantageous result is securedwithout unduly increasing the distance between the centers of theadjacent roll stands, whereby all of the advantages of well knowninstallations are retaine I claim:

1. In a rolling mill, 8. two-high roughing stand, a two-high finishingstand, said stands being side by sidein end-to-end relationship, afloating housing intermediate said stands. a spindle carried by saidhousing and connecting the lower-r011 of one stand with the lower rollof the other stand, and means for driving the upper roll of one of thestands from said spindle, substantially as described.

2. In a rolling mill, two stands of twohigh rolls. said stands beingside by side in end-to-end relationship, a floating housing intermediatesaid stands, a spindle carried by said housing and connecting the lowerroll of one stand with the lower roll of the other stand, and means perroll of one of the stands from said spindle, substantially as described.

3. In a rolling mill, two stands of twohigh rolls, said stands beingside by side in end-to-end relationship. a floating housing intermediatesaid-stands. a spindle carried by said housing and connecting the lowerroll ofone stand with the lower roll of the other stand, and means forfrictionally driving the upper roll of'one of the stands from saidspindle. substantially as described.

4. In a rolling'mill. two stands of two high rolls. said stands beingside by side in cnd-to-end relationship. a housing intermediate saidstands, a spindle journaled in said housing and connecting the lowerrolls in the respective stands. a sleeve journaled in said housing,meansforming a driving connect-ion between. said sleeve and the upperroll of one of saidstands, and means for frictionally driving saidsleeve from said spindle, substantially as described.

In a rolling mill, two stands of twohigh rolls, a floating housingintermediate for driving the upsaid stands, a spindle journaled in saidhousing and'operatively connecting the lower respective stands, adriving connection. for the upper roll of one of said stands, and meansfor 'frictionally driving said connection from said spindle,substantially as described.

6. In a two-high rolling mill, a. floating housing opposite one end ofsaid mill, a spindle carried nected to the lower roll of said mill, andmeans for driving the upper roll of said mill from said spindle,substantially as described.

by said housing and con- .7. In a two-high rolling mill, a floatinghousing opposite one end of said mill, a

spindle carried by said housing and connected to the lower' 'oll of saidmill, and means-foifrictionally driving the upper roll of said mill fromsaid spindle, substantially as described.

8. In atwo-high rolling mill, a floating housingopposite one end of saidmill, a

spindle journaled in said housing and connected to the lower roll ofsaid mill, a

sleeve journaled in said housing, means forming a driving connectionbet-ween said :sleeve and the upper roll of said mill, and

means for fi-ictionally driving said sleewp from said spindle.substantially as described.

9. In a two-high rolling mill, a floating housing opposite one end ofsaid mill, :1 spindle journaled in said housing and connected to thelower roll of said mill, a driv ing iconnection for the upper'roll ofsaid mill, and means for frictionally driving said connection from saidspindle, substantially as described.

In testimony whereof I have hereunto set my hand.

YIFLORENQE o. BIGGERT, JR.-

